Question #43ded

1 Answer
May 11, 2014

The hydrogen ion concentration is 4.0 ×10^"-8"color(white)(l) "mol/L".

Explanation:

The definition of pH is

"pH" = -log["H"_3"O"^+]

To get the hydrogen ion concentration, we take the antilogarithm of the pH (the 10^x button on the calculator).

["H"_3"O"^"+"] = 10^"-pH"color(white)(l) "mol/L" = 10^"-7.4"color(white)(l) "mol/L"= 4.0 × 10^"-8" color(white)(l)"mol/L"